SR 12 over Black Bayou
FairWashington County, Mississippi · 8.1 MI E SR 1 · Structure no. 310001207600930
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 281 ft
- 7 main spans
- Daily traffic
- 600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 12 over Black Bayou is a prestressed concrete stringer/multi-beam or girder carrying SR 12 over Black Bayou in Washington County, Mississippi. It was built in 1983, so it is 42 years old, older than the Mississippi average of 38.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 600 vehicles a day, roughly 11% of them trucks, projected to reach 600 by 2043. The structure is 281 ft (85.6 m) long and 37 ft wide. If it were closed, the detour would be 23 mi (37 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 12 over Black Bayou built?
It was built in 1983, making it 42 years old in 2025.
What condition is SR 12 over Black Bayou in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.
How much traffic does SR 12 over Black Bayou carry?
About 600 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR 12 over Black Bayou?
The structure is 281 ft (85.6 m) long with a longest span of 40 ft (12.2 m) and a deck 37 ft wide.
Who owns SR 12 over Black Bayou?
It is owned by the State Highway Agency.